San Jose Police Department has arrested two suspects, Anh Tong (pictured) and his brother Duc Tong in the January 26, 2014 murder of Richard Phan that occurred on the 3400 block of Suncrest Avenue in San Jose.

Photo: San Jose Police Dept.

San Jose Police Department has arrested two suspects, Anh Tong...

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San Jose Police Department has arrested two suspects, Anh Tong and his brother Duc Tong (pictured) in the January 26, 2014 murder of Richard Phan that occurred on the 3400 block of Suncrest Avenue in San Jose.

Identical twin brothers were arrested Monday in connection with the stabbing death of a man trying to break up a fight at a birthday party in San Jose, authorities said.

Anh and Tuc Dong, 18, are being held without bail on suspicion of murder in the death of Richard Phan, 22, who was killed while trying to stop a fight at a party at a friend's home on the 3400 block of Suncrest Avenue about 1:30 a.m. Sunday, authorities said.

The fact that the suspects are twins could raise challenges for prosecutors, said attorney and legal expert Steve Clark. Since they are identical, they share the same DNA, he said, and their similar appearance could allow the defense to dispute witness accounts.